“Then the conclusion to be drawn is that while the emergence of patriarchy may not be inevitable in modern nations, it is highly probable.” I don’t disagree with you in the slightest here. That article was not meant to paint a picture of an ideal world, nor to say that we should model ourselves after any of these cultures. It was simply to illustrate that not all contemporary societies are patriarchal. And if you think that any of these 6 are, you don’t actually understand the meaning of that word. Men having some power in some arenas is not remotely the same as a relatively few men having overwhelming power in all arenas and other men having relative power over women — by a long shot!
In the US, White men make up about 30% of the population and yet hold about 80% of the power. It’s essentially apartheid all over again. That is not what is described in any of those cultures. For someone who claims to value precision, you seem to be painting with an awfully broad brush!